bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:e3:f4:07:78:02, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5810/1:b..l rcu: (detected by 1, t=10503 jiffies, g=22329, q=357 ncpus=2) task:syz-executor state:R running task stack:21232 pid:5810 tgid:5810 ppid:5808 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0xe55/0x5740 kernel/sched/core.c:6693 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7015 irqentry_exit+0x36/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:unwind_next_frame+0x26/0x20c0 arch/x86/kernel/unwind_orc.c:471 Code: 90 90 90 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 48 89 fa 41 57 48 c1 ea 03 41 56 41 55 49 89 fd 41 54 55 53 48 83 ec 38 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 48 0a 00 00 41 8b 5d 00 85 db RSP: 0018:ffffc9000318f920 EFLAGS: 00000282 RAX: dffffc0000000000 RBX: ffffc9000318f990 RCX: 0000000000000000 RDX: 1ffff92000631f32 RSI: ffffffff8b233f9d RDI: ffffc9000318f990 RBP: ffffc9000318fa20 R08: ffffc9000318f9c4 R09: ffffffff9100b596 R10: ffffc9000318f990 R11: 00000000000103a3 R12: ffffffff817946d0 R13: ffffc9000318f990 R14: 0000000000000000 R15: ffff88802a3c2440 arch_stack_walk+0x95/0x100 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 save_stack+0x162/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x8d/0x400 mm/page_owner.c:297 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0x661/0x1080 mm/page_alloc.c:2657 __put_partials+0x14c/0x170 mm/slub.c:3145 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4085 [inline] slab_alloc_node mm/slub.c:4134 [inline] __kmalloc_cache_noprof+0x11e/0x300 mm/slub.c:4290 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] alloc_pipe_info+0x10e/0x590 fs/pipe.c:798 get_pipe_inode fs/pipe.c:890 [inline] create_pipe_files+0x8c/0x850 fs/pipe.c:922 __do_pipe_flags fs/pipe.c:973 [inline] do_pipe2+0xb0/0x1d0 fs/pipe.c:1024 __do_sys_pipe2 fs/pipe.c:1042 [inline] __se_sys_pipe2 fs/pipe.c:1040 [inline] __x64_sys_pipe2+0x54/0x80 fs/pipe.c:1040 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9ae377d469 RSP: 002b:00007ffcff6db1b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000125 RAX: ffffffffffffffda RBX: 000055558dc3baf0 RCX: 00007f9ae377d469 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 00007ffcff6db1d8 RBP: 00007ffcff6db790 R08: 0000000000000007 R09: 000055558dc40ef0 R10: 928d3abf3bde0f35 R11: 0000000000000246 R12: 00007ffcff6db5e0 R13: 000055558dc3eb30 R14: 00007ffcff6db300 R15: 000055558dc3d930 rcu: rcu_preempt kthread starved for 9548 jiffies! g22329 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:25680 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0xe55/0x5740 kernel/sched/core.c:6693 __schedule_loop kernel/sched/core.c:6770 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6785 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2615 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 rcu: Stack dump where RCU GP kthread last ran: CPU: 1 UID: 0 PID: 24 Comm: ksoftirqd/1 Not tainted 6.12.0-rc7-syzkaller-00070-g0a9b9d17f3a7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:__sanitizer_cov_trace_pc+0x66/0x70 kernel/kcov.c:235 Code: 82 f8 15 00 00 83 f8 02 75 20 48 8b 8a 00 16 00 00 8b 92 fc 15 00 00 48 8b 01 48 83 c0 01 48 39 d0 73 07 48 89 01 48 89 34 c1 cc cc cc cc 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc900001e7250 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff89cb36c8 RDX: ffff88801d6e8000 RSI: ffffffff89cb36d2 RDI: 0000000000000004 RBP: 0000000000000003 R08: 0000000000000004 R09: 0000000000000038 R10: 000000000000001e R11: 0000000000000000 R12: 000000000000001e R13: ffff88807b9cf4b8 R14: 0000000000000038 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffea28cbb80 CR3: 000000000df7c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rt6_score_route+0x92/0x430 net/ipv6/route.c:720 find_match+0x221/0xf80 net/ipv6/route.c:749 __find_rr_leaf+0x141/0xe00 net/ipv6/route.c:832 find_rr_leaf net/ipv6/route.c:853 [inline] rt6_select net/ipv6/route.c:897 [inline] fib6_table_lookup+0x57e/0xa30 net/ipv6/route.c:2195 ip6_pol_route+0x1cd/0x1120 net/ipv6/route.c:2231 pol_lookup_func include/net/ip6_fib.h:616 [inline] fib6_rule_lookup+0x536/0x720 net/ipv6/fib6_rules.c:117 ip6_route_input_lookup net/ipv6/route.c:2300 [inline] ip6_route_input+0x663/0xc10 net/ipv6/route.c:2596 ip6_rcv_finish_core.constprop.0+0x1a0/0x5d0 net/ipv6/ip6_input.c:66 ip6_rcv_finish net/ipv6/ip6_input.c:77 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ipv6_rcv+0x1e4/0x680 net/ipv6/ip6_input.c:309 __netif_receive_skb_one_core+0x12e/0x1e0 net/core/dev.c:5670 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5783 process_backlog+0x443/0x15f0 net/core/dev.c:6115 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6779 napi_poll net/core/dev.c:6848 [inline] net_rx_action+0xa92/0x1010 net/core/dev.c:6970 handle_softirqs+0x213/0x8f0 kernel/softirq.c:554 run_ksoftirqd kernel/softirq.c:927 [inline] run_ksoftirqd+0x3a/0x60 kernel/softirq.c:919 smpboot_thread_fn+0x661/0xa30 kernel/smpboot.c:164 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:e3:f4:07:78:02, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:e3:f4:07:78:02, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:e3:f4:07:78:02, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:e3:f4:07:78:02, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:e3:f4:07:78:02, vlan:0) net_ratelimit: 42392 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:e3:f4:07:78:02, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:e3:f4:07:78:02, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:e3:f4:07:78:02, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:e3:f4:07:78:02, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:e3:f4:07:78:02, vlan:0)